Claim Child Benefit for a new baby – it can only be backdated 3 months

You can claim Child Benefit 48 hours after you register the birth, or once a child comes to live with you. A claim can only be backdated up to 3 months, so claim as soon as you can.

Deadline

No fixed deadline

Last checked

Checked against the official source: 20 October 2026

What if you miss the deadline? Child Benefit is only backdated up to 3 months from the date you make the claim. If you claim later, you lose the payments for the earlier months.

Child Benefit is paid to people responsible for a child under 16, or under 20 if they stay in approved education or training. You should claim even if you choose not to get the payments, because you still get other advantages. Check if you're eligible on GOV.UK.

How to do it

1. Register the birth first. You can claim 48 hours after registering the birth, or once the child comes to live with you.
2. Use the online service on GOV.UK to make a new claim or add a child to an existing claim.
3. If you cannot apply online, claim by post or by phone instead.
4. Have the birth or adoption certificate ready. A claim without it takes longer.
5. If your income is high, check the High Income Child Benefit Charge before you decide whether to get the payments.

Common questions

How far back can Child Benefit be backdated?

Up to 3 months from the date you make the claim. Claim soon after the birth so you do not lose any payments.

Should I claim Child Benefit if I do not want the money?

Yes. GOV.UK says you should still claim to get the other advantages. For example, you get National Insurance credits automatically if you claim Child Benefit and your child is under 12.

When can I claim Child Benefit after the birth?

You can claim 48 hours after registering the birth, or once the child comes to live with you.

Official source: gov.uk (opens in a new tab)

This information is not legal or tax advice.